Path parameter duplicated in body.

[RolandsThinAirLabs]

Similar to issue#1356

path parameters provided in the RouteConfig interface are also displayed as parameters in the body of the request in Swagger docs.

for example

{
  method: 'PATCH',
  path: '/user/:id/name/:newName'
}

Will generate a swagger doc that has both path parameters and body parameters as arguments for the route.
The body is not required and the resolver will not receive the body parameters as arguments.

There could be a check to see if the mutation's variables are already accounted for in the path as parameters and then those variables could be skipped when building the request's expected body for swagger.

[RolandsThinAirLabs]

I've come up with a solution #1367 I'm not sure how to proceed from here.

@Urigo if you could advise on how to submit my solution for review, it would be appreciated.